Re: [PATCH] libc: fix daylight saving time handling

> From: Guillaume Bourcier <guillaumebourcier@...>
>
> The algorithm computing daylight saving time incorrectly adds a day for
> each month after January for leap years. The clock shift from/to DST can
> be delayed if the last Sunday of a transition month is exactly seven
> days before the first of the following month.
>
> This change adds a day for the February month only.
>
> Signed-off-by: Guillaume Bourcier <guillaumebourcier@...>
> Signed-off-by: Richard Braun <rbraun@...>
> ---
>  libc/misc/time/time.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/libc/misc/time/time.c b/libc/misc/time/time.c
> index 19d68e1..8e2ebf1 100644
> --- a/libc/misc/time/time.c
> +++ b/libc/misc/time/time.c
> @@ -689,7 +689,7 @@ static int tm_isdst(register const struct tm *__restrict ptm,
>   ++day;
>   }
>   monlen = 31 + day_cor[r->month -1] - day_cor[r->month];
> - if (isleap && (r->month > 1)) {
> + if (isleap && (r->month == 2)) {
>   ++monlen;
>   }
>   /* Wweekday (0 is Sunday) of 1st of the month